Sealing connector for photovoltaic facility

Through the design of sealed connectors of photovoltaic facilities, the structure and components of the plug shell and handle are used to solve the problem of the lack of axial tightening seal of traditional photovoltaic connectors, the sealing effect and circuit connection stability are improved, and the circuit connection is ensured. Safety and service life.

CN119231236AInactive Publication Date: 2024-12-31SUZHOU VOCATIONAL UNIVERSITY (SUZHOU OPEN UNIVERSITY)
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202411412731.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-11
Publication Date
2024-12-31
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The plug-in locking components of traditional photovoltaic connectors lack the axial compression sealing effect, and cannot guarantee the sufficient compression sealing of the connector, which affects the safety and service life of the circuit connection.

Method used

A photovoltaic facility sealing connector is designed. Through the structure of the insertion shell and the insertion handle, the sealing ring is clamped by the twisting of the insertion handle using components such as the diameter shrinkage port, the flared part, the sealing ring, the projection and the spiral surface. The elastic structure of the elliptical surface and support plate is tight, so as to ensure the extruded contact between the moving terminal and the fixed terminal, and reduce the contact resistivity.

Benefits of technology

The sealing effect of the plug case and the handle is improved, the safety and service life of the circuit are ensured, the resistivity of the contact surface between the moving terminal and the fixed terminal is reduced, and the stability and safety of the connection are enhanced.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119231236A_ABST
    Figure CN119231236A_ABST
Patent Text Reader

Abstract

The invention discloses a photovoltaic facility sealing connector, and relates to the field of photovoltaic connectors, the photovoltaic facility sealing connector comprises an insertion shell and an insertion handle, the end face of the insertion shell is provided with a reducing opening, the inner wall of the insertion shell is provided with a fixed terminal, the surface of the insertion handle is provided with a movable terminal, the insertion handle is inserted into the insertion shell through the reducing opening, so that the movable terminal is in contact with the fixed terminal, and the end part of the insertion shell is provided with a flaring part. A diameter-expanding plate matched with the flaring part is fixed to the inserting handle, a sealing ring is arranged between the diameter-expanding plate and the flaring part, protruding pieces are symmetrically arranged on the surface of the inserting handle, lug openings allowing the protruding pieces to be inserted therein are formed in the edge of the diameter-reducing opening, and the inner side face, located between the two lug openings, of the diameter-reducing opening is provided with two spiral faces distributed in a central symmetry mode. After the plug shell and the plug handle are plugged, the plug handle is twisted, the protruding piece abuts against the spiral face to move, the plug-in pulling force between the plug shell and the plug handle is increased, the sealing ring is stably clamped, and the plug-in sealing effect of the plug shell and the plug handle is improved.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic connectors, and in particular to a sealed connector for photovoltaic facilities. Background Art

[0002] Photovoltaic connectors are important hubs for line conduction in photovoltaic power generation systems. The line connections between photovoltaic panels and between photovoltaic panels and combiner boxes, inverters and other facilities all need to be connected through connectors.

[0003] The traditional photovoltaic connector is divided into two parts with terminals. The circuit is turned on by plugging the two parts together to make the terminals contact. Since the connector is exposed to an unprotected environment, the sealing effect of the connector directly affects the safety and service life of the circuit connection. The two plug-in parts of the traditional photovoltaic connector are locked and sealed by a snap-on lock. The hook structure can only limit the slippage of the two plug-in parts, lacks the axial compression effect, and cannot ensure that the contact parts of the two parts are fully compressed and sealed. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art, the purpose of the present invention is to provide a sealed connector for photovoltaic facilities, which is used to solve the problem that the plug-in locking components of the existing photovoltaic connectors lack axial automatic compression and sealing of the two plug-in parts of the connector.

[0005] In order to solve the problems of the prior art, the technical solution of the present invention is as follows:

[0006] A sealed connector for photovoltaic facilities comprises a plug shell and a plug handle, wherein the end face of the plug shell has a reduced diameter opening, a fixed terminal is arranged on the inner wall of the plug shell, a movable terminal is arranged on the surface of the plug handle, the plug handle is inserted into the plug shell through the reduced diameter opening so that the movable terminal contacts the fixed terminal, the end of the plug shell has a flared portion, an expanded plate adapted to the expanded portion is fixed to the plug handle, a sealing ring is arranged between the expanded plate and the expanded portion, protrusions are symmetrically arranged on the surface of the plug handle, ears adapted to the insertion of the protrusions are arranged at the edge of the reduced diameter opening, the inner side surface of the reduced diameter opening is located between the two ears and is two spiral surfaces symmetrically distributed around the center, the protrusion is inserted from the ear opening to the inner side of the reduced diameter opening, and then the plug handle is twisted so that the protrusion contacts the spiral surface and rotates and moves, thereby increasing the insertion depth of the plug handle into the plug shell, so that the expanded plate and the flared portion can press the sealing ring tightly.

[0007] Preferably, the spiral surface inside the reduced diameter opening is provided with a spherical concave positioning groove, which is distributed at an angle of 90° with the ear opening, and the surface of the protruding piece has a spherical protruding positioning block, which is adapted to the positioning groove.

[0008] Preferably, the sealing ring has a plurality of annular cavities inside, and the outside of the sealing ring is located in the gap between adjacent annular cavities and is concave.

[0009] Preferably, a plurality of convex rings are arranged on the surfaces of the expanding portion, the expanding plate and the sealing ring in contact with each other, and the convex rings of the expanding portion and the convex rings of the expanding plate are staggered.

[0010] Preferably, the insert handle has a movable cavity inside, the protruding piece and the movable terminal are symmetrically and elastically inserted into the movable cavity by a spring, the inner wall of the insert shell has an elliptical surface, the maximum diameter part of the elliptical surface is aligned with the ear mouth, when the insert handle drives the protruding piece to twist, the elliptical surface gradually squeezes the protruding piece to shrink and move, and a support member is arranged in the movable cavity, the support member contacts the protruding piece and the movable terminal, so that the movable terminal expands and moves when the protruding piece shrinks and moves.

[0011] Preferably, the support member includes two symmetrically distributed support plates, which are coaxially elastically rotated in the movable cavity through a torsion spring, and the support plates are bent, and two ends of the support plates respectively abut against the protruding member and the movable terminal on the same side.

[0012] Preferably, the end of the support plate has a bent elastic portion, and the support plate contacts the protruding piece and the movable terminal respectively through the bent elastic portion.

[0013] Preferably, the distance between one end of the support plate contacting the protruding piece and its rotating position is greater than the distance between one end of the support plate contacting the movable terminal and its rotating position.

[0014] Preferably, the plug housing has a slot inside, the fixed terminal is arranged on the slot surface, and a sealing plate is elastically slidable in the slot via an adaptor spring.

[0015] Compared with the prior art, the advantages of the present invention are as follows:

[0016] 1. The present invention twists the plug handle after plugging the plug shell and the plug handle together, and increases the plug-in tension between the plug shell and the plug handle by causing the protruding piece to move against the spiral surface, so that the sealing ring is stably clamped, thereby improving the sealing effect of the plug-in connection between the plug shell and the plug handle.

[0017] 2. The protruding part of the present invention shrinks when contacting the elliptical surface during rotation, causing the support plate to twist and contact the movable terminal, thereby ensuring that the movable terminal and the fixed terminal are in squeeze contact and reducing the resistivity of the contact surface between the movable terminal and the fixed terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic cross-sectional structure diagram of the plug handle and the plug shell separated from each other according to the present invention;

[0020] Figure 3 It is a schematic cross-sectional view of the plug-in connection between the plug handle and the plug shell of the present invention;

[0021] Figure 4It is a schematic diagram of the helical surface structure of the protruding member of the present invention;

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of the sealing ring of the present invention;

[0023] Figure 6 It is a schematic diagram of the alignment structure of the protruding member and the elliptical surface of the present invention;

[0024] Figure 7 It is a schematic diagram of the support structure of the present invention.

[0025] Figure numerals: 1, plug shell; 11, flared part; 12, ear mouth; 13, spiral surface; 14, positioning groove; 15, slot; 16, elliptical surface; 2, plug handle; 21, expansion plate; 3, sealing ring; 4, protruding part; 41, positioning block; 5, movable terminal; 6, fixed terminal; 7, support plate; 8, sealing plate; 9, convex ring. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] Photovoltaic facility sealed connector, with male and female parts, the male and female plugs have the functions of axial locking and terminal clamping;

[0028] The male plug structure is as follows:

[0029] like Figure 1 , Figure 2 As shown, two movable terminals 5 are symmetrically arranged near the front end of the plug handle 2, and the circuit enters the interior of the plug handle 2 from the rear end and is connected to the movable terminals 5. An expansion plate 21 is integrally fixed to the outside of the plug handle 2 near the rear end, and a protruding piece 4 is symmetrically arranged in the middle of the plug handle 2. The edge of the protruding piece 4 is in an arc shape, and a side of the protruding piece 4 close to the rear end of the plug handle 2 has a spherical protruding positioning block 41.

[0030] The female plug structure is as follows:

[0031] like Figure 1 , Figure 2 As shown, the end face of the plug shell 1 has a reduced diameter opening, and ear openings 12 are symmetrically provided at the edge of the reduced diameter opening. The inner side surface of the reduced diameter opening is located between the two ear openings 12 and is two centrally symmetrically distributed spiral surfaces 13. A spherically concave positioning groove 14 is provided at a position where the angle between the spiral surface 13 and the ear opening 12 is 90°. The expanded portion 11 is integrally fixed at the end edge of the plug shell 1, and two fixed terminals 6 are symmetrically fixed to the inner wall of the plug shell 1. The circuit enters the interior of the plug shell 1 from the rear end and is connected to the fixed terminals 6.

[0032] The axial locking principle is as follows:

[0033] like Figure 3 , Figure 4 As shown, the sealing ring 3 is placed on the inner side of the flared portion 11, the protruding piece 4 is axially aligned with the ear opening 12, the end of the plug handle 2 is inserted into the plug shell 1 from the reduced diameter opening, and the protruding piece 4 is inserted from the ear opening 12 to the inner side of the reduced diameter opening. At this time, the diameter expansion plate 21 is inserted into the flared portion 11 to pre-tighten the sealing ring 3, and then the plug handle 2 is rotated to make the protruding piece 4 resist the surface rotation of the spiral surface 13, and the plug handle 2 is pushed to axially displace into the plug shell 1 through the squeezing effect between the spiral surface 13 and the protruding piece 4, so that the sealing ring 3 is stably pressed between the diameter expansion plate 21 and the flared portion 11 until the plug handle 2 rotates 90°, at which time the movable terminal 5 rotates to contact with the fixed terminal 6, and the circuit is turned on. When the frustration of the positioning block 41 being inserted into the positioning groove 14 is felt, the plug-in fixation of the plug shell 1 and the plug handle 2 is completed, so that the plug shell 1 and the plug handle 2 are sealed and plugged;

[0034] When separating the plug shell 1 and the plug handle 2, it is only necessary to forcefully rotate the plug handle 2 in the opposite direction so that the positioning block 41 slides out of the positioning groove 14. When the protruding member 4 is rotated to align with the ear opening 12, the plug handle 2 can be pulled out of the plug shell 1. When separating the plug shell 1 and the plug handle 2, the plug shell 1 is rotated first, so that the movable terminal 5 and the fixed terminal 6 are first separated by misalignment, and then the plug shell 1 and the plug handle 2 are separated, so that the disconnection operation is safer.

[0035] like Figure 5 As shown, the sealing ring 3 has a plurality of annular cavities inside, and the outside of the sealing ring 3 is located in the gap between adjacent annular cavities and is concave. The surfaces where the expanding portion 11 and the expanding plate 21 contact the sealing ring 3 are provided with a plurality of convex rings 9, and the convex rings 9 of the expanding portion 11 and the convex rings 9 of the expanding plate 21 are staggered. The sealing ring 3 is deformed by squeezing the convex rings 9 on the surfaces of the expanding portion 11 and the expanding plate 21, so that the deformations of the sealing ring 3 and the convex rings 9 match each other, forming a plurality of sealing barriers, thereby improving the sealing effect.

[0036] The terminal clamping principle is as follows:

[0037] like Figure 2 , Figure 3 , Figure 6 , Figure 7 As shown, the interior of the plug handle 2 is provided with an active cavity, and the two protruding pieces 4 are symmetrically elastically slidably inserted into the active cavity by a spring. Similarly, the two movable terminals 5 are symmetrically elastically slidably inserted into the active cavity by a spring, and the inner wall of the plug housing 1 has an elliptical surface 16, and the angle of the maximum diameter portion of the elliptical surface 16 is aligned with the ear opening 12. The support member includes two symmetrically distributed support plates 7, and the two support plates 7 are coaxially elastically rotated in the active cavity by a torsion spring. The support plates 7 are bent, and the two ends of the support plates 7 respectively contact the protruding piece 4 and the movable terminal 5 on the same side;

[0038] The movable terminal 5 in the uninserted state is retracted into the movable cavity by the elastic force, and the protruding piece 4 is relatively protruding by the elastic force. When the plug handle 2 is inserted into the plug shell 1, the edge of the protruding piece 4 contacts the maximum diameter part of the elliptical surface 16. When the plug handle 2 is rotated, the diameter of the position where the protruding piece 4 contacts the elliptical surface 16 gradually decreases, so that the protruding piece 4 is pressed and gradually shrinks into the movable cavity. The inner side of the protruding piece 4 rotates against the lower end of the support plate 7, so that the top end of the support plate 7 moves outward against the movable terminal 5, so that the contact between the movable terminal 5 and the fixed terminal 6 is pressed by the support plate 7, which is used to reduce the contact surface resistivity of the movable terminal 5 and the fixed terminal 6.

[0039] like Figure 7 As shown, the end of the support plate 7 has a bent elastic portion, and the support plate 7 contacts the protruding piece 4 and the movable terminal 5 respectively through the bent elastic portion. The bent elastic portion has a certain elastic deformation effect, so that the support plate 7 has a certain elastic force effect on the contact between the movable terminal 5 and the fixed terminal 6, thereby avoiding damage to the movable terminal 5 and the fixed terminal 6 caused by hard extrusion.

[0040] like Figure 7 As shown, the distance between the end of the support plate 7 contacting the protruding piece 4 and its rotating part is greater than the distance between the end of the support plate 7 contacting the movable terminal 5 and its rotating part. The pressure of the protruding piece 4 on the support plate 7 is F1, and the pressure of the support plate 7 on the movable terminal 5 is F2. According to the lever principle, F2>F1, the intensity of the pressure applied to the movable terminal 5 and the fixed terminal 6 is increased.

[0041] like Figure 2 As shown, a slot 15 is provided near the tail end of the plug housing 1, the diameter of the slot 15 is smaller than the diameter of the reduced diameter opening, the fixed terminal 6 is provided on the surface of the slot 15, and a sealing plate 8 is elastically slidable in the slot 15 through an adaptor spring;

[0042] When not plugged in, the spring acts to move the sealing plate 8 to the end portion of the slot 15 to seal the slot 15, thereby protecting the fixed terminal 6 from dirt. When the plug housing 1 and the plug handle 2 are plugged in, the end of the plug handle 2 squeezes the sealing plate 8 deep into the slot 15, so that the fixed terminal 6 is exposed and in contact with the movable terminal 5, and the sealing plate 8 exerts an elastic reaction force on the plug handle 2, so that the positioning block 41 can stably maintain engagement with the positioning groove 14.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Sealed connectors for photovoltaic facilities, including: The invention relates to a plug shell (1) and a plug handle (2), wherein the end face of the plug shell (1) has a reduced diameter opening, the inner wall of the plug shell (1) is provided with a fixed terminal (6), the surface of the plug handle (2) has a movable terminal (5), the plug handle (2) is inserted into the plug shell (1) through the reduced diameter opening so that the movable terminal (5) contacts the fixed terminal (6), and the plug shell (1) has an expanded portion (11) at the end, the plug handle (2) is fixed with an expanded plate (21) adapted to the expanded portion (11), a sealing ring (3) is provided between the expanded plate (21) and the expanded portion (11), and the plug handle (2) is provided with a sealing ring (3) between the expanded plate (21) and the expanded portion (11), and the plug handle (2) is provided with a sealing ring (3) between the expanded plate (21) and the expanded portion (11), and the plug handle (2) is provided with a sealing ring (3) between the expanded plate (21) and the expanded portion (11). ) is symmetrically arranged on the surface of the plug housing (1), the edge of the reduced diameter opening is provided with an ear opening (12) adapted for inserting the protruding piece (4), the inner side surface of the reduced diameter opening is located between the two ear openings (12) and is two centrally symmetrically distributed spiral surfaces (13), after the protruding piece (4) is inserted from the ear opening (12) to the inner side of the reduced diameter opening, the insertion handle (2) is twisted to make the protruding piece (4) contact the spiral surface (13) and rotate and move, thereby increasing the insertion depth of the insertion handle (2) into the plug housing (1), so that the expansion plate (21) and the expansion portion (11) can press the sealing ring (3).

2. The photovoltaic facility sealing connector according to claim 1, characterized in that: The spiral surface (13) on the inner side of the reduced diameter opening is provided with a spherically concave positioning groove (14), the positioning groove (14) and the ear opening (12) are distributed at an angle of 90°, and the surface of the protruding piece (4) is provided with a spherically protruding positioning block (41), the positioning block (41) being adapted to the positioning groove (14).

3. The photovoltaic facility sealing connector according to claim 1, characterized in that: The sealing ring (3) has a plurality of annular cavities inside, and the outside of the sealing ring (3) is located in the gap between adjacent annular cavities and is in a concave shape.

4. The photovoltaic facility sealing connector according to claim 3, characterized in that: The surfaces where the expanding portion (11) and the expanding plate (21) contact the sealing ring (3) are all provided with a plurality of convex rings (9), and the convex rings (9) of the expanding portion (11) and the convex rings (9) of the expanding plate (21) are staggered.

5. The photovoltaic facility sealing connector according to claim 1, characterized in that: The insert handle (2) has an active cavity inside, the protruding piece (4) and the movable terminal (5) are symmetrically and elastically inserted into the active cavity by means of a spring, the inner wall of the insert shell (1) has an elliptical surface (16), the maximum diameter portion of the elliptical surface (16) is aligned with the ear opening (12), when the insert handle (2) drives the protruding piece (4) to twist, the elliptical surface (16) gradually squeezes the protruding piece (4) to shrink and move, and a support member is arranged in the active cavity, the support member abuts against the protruding piece (4) and the movable terminal (5), so that when the protruding piece (4) shrinks and moves, the movable terminal (5) expands and moves.

6. The photovoltaic facility sealing connector according to claim 5, characterized in that: The support member comprises two symmetrically distributed support plates (7), the two support plates (7) being coaxially elastically rotated in the movable cavity through a torsion spring, the support plates (7) being bent, and the two ends of the support plates (7) respectively contact the protruding member (4) and the movable terminal (5) on the same side.

7. The photovoltaic facility sealing connector according to claim 6, characterized in that: The end of the support plate (7) has a bent elastic portion, and the support plate (7) contacts the protruding piece (4) and the movable terminal (5) respectively through the bent elastic portion.

8. The photovoltaic facility sealing connector according to claim 6, characterized in that: The distance between the end of the support plate (7) contacting the protruding piece (4) and its rotating position is greater than the distance between the end of the support plate (7) contacting the movable terminal (5) and its rotating position.

9. The photovoltaic facility sealing connector according to claim 1, characterized in that: The plug housing (1) has a slot (15) inside, the fixed terminal (6) is arranged on the surface of the slot (15), and a sealing plate (8) is elastically slidable in the slot (15) via an adaptable spring.